Maintenance 5
U1253B User’s and Service Guide 125
Charging battery
This multimeter is powered by a 7.2 V or 8.4 V NiMH
rechargeable battery. It is strongly recommended that you
use the specified 24- volt DC adapter included as an
accessory to charge the rechargeable battery. Never rotate
the rotary switch while the battery is being charged because
a DC voltage of 24 V is applied to the charging terminals.
Follow the procedures below to charge the battery:
1 Remove the test leads from the multimeter.
2 Turn the rotary switch to .
3 Plug the DC adapter into a power outlet.
Do not discharge the battery by shorting it or subjecting it to reverse
polarity. Make sure a battery is rechargeable before charging it.
Do not rotate the rotary switch when the battery is being charged.
• Do not rotate the rotary switch from position when
charging the battery.
• Perform battery charging only with 7.2 V or 8.4 V NiMH
rechargeable battery, 9 V size.
• Disconnect test leads from all the terminals when charging
the battery.
• Ensure proper insertion of battery in the multimeter, and follow the
correct polarity.
For the battery charger, the mains supply voltage fluctuations must not
exceed ±10%.
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